Update: the shot blasted panels provided by Zahner were not for all stores but for items such as the Soho New York store 12 gauge stainless steel internal panel system. As user BT points out, there are other suppliers for stainless steel panels such as the Japanese firm Kikukawa, who did panels for most of the Apple mini stores, for example. Zahner also did the panel system for Herzog and DeMeurons De Young Museum.